American Audio DCD-PRO300 Owner's Manual download pdf (Page 4)

Master Level Controls

Each channel is able to control its volume independently relativ e to the

other channel. At the bottom left of the rear panel, there are 2 screwdriver

adjustment knobs which correspond to the volume level of the channel

identifie d by a channel designator below it.

The volume range is labeled Minimum to Max imum and has 1 steps

(Clicks) at a center detent position as a reference. Rotate the knob

clockwise to increase output, and counter clockwise to decrease

output.

These adjustm ents set the master leve l and if not set up at initi al setup

of the Power Pro 300 will or may adversely affect the perform ance of

the amplifi er.

To set the Master Lever controls begin by adjusting the front panel

“Volume Trim” to its fully clockwi se posi tion. Also set the front panel

“Balance Trim” to its cent er dete nt posi tion. Now adjust both the left

and Right Channel Master Level contr ols to set a “Maximum” desir ed

volume for the Power Pro 300 in it s appl ication, as wel l as setting an

Appropr iate ”Bal ande” from left to right.

Now the front panel Volume and Balance Trim controls can Make fine

adjust ments to your set up in this appli cati on.

There are a total of 4RCA inputs on the back panel of the Power Pro 300.

These RCA inputs are labeled as “Line 1 Input” and “Line 2 Input”. They

are also designated with an “R” or an “L” as Right channel or Left Channel

inputs respectively.

“Line 2 Input” should be used as the “primary” or normal input for vario us

line level sources that may be available locally to the amplifier. “Line 1

Input” is a priority switching input that can be used for a second input,

such as, the output of a second source, and will take over as the primary

input whenever a signal with a minimum of 5mv of level is present.

Whenever, there is an absence of signal at the “Line 2 Input” RCAs input

signal. An adjustable delay of from 3 modate the nature of the source

connected to the “Line 1 Input” RCAs.

As an example, if the “Line 1 Input” source was a CD Changer, The delay

could be adjusted to prevent switch ing back to the “ Line 2 Input ” source

while the changer moves from one disc to another.

Speaker Level Input

The Power Pro 300 also provi des a pair of speaker level inputs for

those appli cati ons where either of the sources has only speaker level

output signal available. This input may be switched to be used in place

of the line 1 or line 2 input.

Mode Switch

To the righ t of the Master Level controls is a switch labeled “MODE” with

“STEREO” and “BRIDGED” as options. If you will be connecting one or

two pair of speakers to the amplifi er, place the switch in the “STEREO”

positi on.

If you will be suing a pair of channels to power a single mono speaker,

place the switch in the “BRIDGED” position, and be sure to read the

section titled “Spea ker Terminals” below.

When you are using the amplifier in “bridged mode”, the amplifier is

now a single channel mono amplifier. The two channels have been

internally connected in series by the “bridge” switch. The Power

Pro 300 is now capable of 250W, bridged into 8 ohms with less than

0.2% THD+N.

For the amplifier to operate properly in the bridged mode you should

have both the “right and left” inputs connected to the amplifier. The

amplifier will sum these signals and create your mono source.

Note: Both of the “Master Level” adjustments should be set to

the same Position, and the ”Balance Trim” should be set to the

center or 12 o’clock position for the amplifier to operatenormally

in the “Bridged” mode.

Note: This Amplifier will produce in excess of 200 watts with a

bridge pair of channels. Please verify that your speakers are

capable of handing such power to avoid possible damage!

Speaker Terminals

Each channel has two pair of multi-way binding post. These are the red

and black screw posts on the rear of the amplifie r. Terminals are provided

for “a” and “b” pairs of speaker for each channel. If you will be suing the

amplifie r as a stereo amplifie r (not a bridged amplifie r) you will connect the

speakers positiv e (red) terminal to the amplifie rs positiv e (red) terminal

using the appropriate gauge speaker wire, and the speakers negative

(black) terminal to the amplifie rs negative (black) terminal (immediately

below the positiv e terminal) using the appropriate gauge speaker wire. If

you would like to use one pair of channels bridged, place the “mode”

switch in the “bridged” positio n and use both red terminals to connect

to the speaker. (See illu strationon page 5)

RCA Input

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American Audio DCD-PRO300 Owner's Manual Page 4

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